Climatic changes in Southern Poland, including the Carpathian Mountains are shown in regional and local scale. There are discussed: changeability of the circulation indices during the winter season and fluctuations of the air temperatures based on the instrumental observations in the mountain stations. The influence of climate is referred to the secular changes in the width of tree rings in Tatra Mountains and the thermal feelings of human body. Local changes of the radiation inflows are characteristic features of developing urbanization.

The authors discuss the average air temperature and mean precipitation amounts in long-term and short — time variability. This research may be a starting point for combining GCM's models (GFDL and GISS) used to forecast spatial distribution of climatic changes in hydrological models on the territory of Poland.Methods of grid simulation using 90-year and 30-year sequences provide sufficient statistical material for a relatively precise estimation. Authors presented stochastic generation of meteorological data in others time step (daily, monthly and yearly) by Markov chain.

In the paper the gas chromatograph for the tropospheric measurements of the trace gases active in the greenhouse effect and the ozone layer destruction are described. For the measurements of the CO, CH4 and C02 an automatic gas chromatograph was constructed. For the CFCs monitoring the gas chromatographic system realizing the enrichment procedure of the air sample is presented. The construction and the operation of the photocmission electron capture type detector is described. This detector was developed for the stratospheric measurements of the CFCs "in situ".

Jan Lasa, The Institute of Nuclear Physics in CracowBogdan Drozdowicz, The Institute of Nuclear Physics in CracowIreneusz Śliwka, The Faculty of Physics and Nuclear Techniques, The University of Mining and Metallurgy in Cracow

Systematic investigations of the isotopic composition in atmospheric C02 and its concentration in Cracow urban area have been carried on at the Environmental Physics De-partment, Faculty of Physics and Nuclear Tbchniques. Continuous sampling at biweekly intervals was supplemented by series of samples representing four-hour periods. Comparison with the similar researches from the other world reference stations enabled estimation of the anthropogenic changes in one of the most degraded region of Poland. Besides this our observations indicate that world isotopic trends noticed by "clean" stations are also registered in Cracow. Concentration of the atmospheric C02 in Cracow along the last ten years is almost constant reaching very high value: 372.5 ppmv if compared with the station at Mauna Loa, Hawaii (ca. 345 ppmv), and does not indicate the remarkable increasing tendency. One can explain this situation by constant level or even decrease in total volume of the burned fossil fuels in Poland, and neighbouring countries.

Taduesz Kuc, Faculty of Physics and Nuclear Tbchniques University of Mining and Metallurgy in CracowMirosław Zimnoch, Faculty of Physics and Nuclear Techniques The Academy of Mining and Metallurgy Al. Mickiewicza 30, 30-059 Kraków, Poland

Radioactivity of several components of atmosphere in Cracow is measured continuously or periodicaly in the framework of international cooperation. The paper describes some results of measurement of tritium, 222Rn, 85Kr and others.

Taduesz Florkowski, Faculty of Physics and Nuclear Tbchniques University of Mining and Metallurgy, CracowJerzy Grabczak, Faculty of Physics and Nuclear Tbchniques University of Mining and Metallurgy, CracowKazimierz Różański, Faculty of Physics and Nuclear Tbchniques University of Mining and Metallurgy, Cracow

It is widely taken for granted that the climate is changing worldwide, partly on account of anthropogenic eiTects. The impact on Polish coast of the accelerated sea level rise (ASLR) due to the intensifying greenhouse effect has been tackled under IPCC auspices (Zeidler 1992). Regional climate change for the Baltic Sea is discussed first, with particular emphasis on recent findings for sea level (mean and extrema) and storm intensity. Examination of trends and statistical distributions for sea level datasets, revised and updated for the Polish coast, has partly confirmed some earlier conclusions drawn for mean sea level showing a trend about 20 cm per 100 years. For the maximum sea levels the rising trend is about two times smaller. More thought is being given to the general problem of land (primarily arable) degradation due to extended landward penetration of sea water due to ASLR. Long-term coastline change is analysed on the basis of routine topographic and bathymetric data collected at the PAS Institute of Hydro-Engineering IBW PAN Coastal Research Station, situated some 75 km from Gdansk. Following that analysis, we are postulating a large-scale model basing on conservation laws for sediment volume, the shore profile equilibrium (the Dean profile), dispersion terms between coastal cells, and linkage between wave energy dissipation and shore transformation. Assessment of coast vulnerability to ASLR (Zeidler 1992) has been summarized to identify the potential hazards. The Polish "Study Area" under IPCC 'Common Methodology* has been defined as the area within which the physical eiTects of the accelerated sea level rise (ASLR) over the next century could be felt. The inland boundaiy of the study area was chosen as the + 2.5 mm contour. In summary, the area endangered under ASLR1 and ASLR2 is very substantial — 2230 km2 both flooded permanently and at risk (flooded periodically). The area losses under ASLR 1 and ASLR2 are respectively 672 and 948 km2. The length of roads Hooded is 400 km and 564 km in the two cases, in addition to 35 and 126 km of railways, 300 and 415 km of primary power lines, and 26 bridges. The population to be evacuated in advance amounts to 142,690 (urban) and 92,150 (rural), thus 234,840 in total. Various protection techniques are proposed to avoid loss of land. Flood protection in the Lower Vistula River has been described in a comprehensive monograph published by IBW PAN (Makowski 1993).

Biogeochemical and bioindication studies in the beech-pine forest catchment exposed to the moderate, but chronic industrial emissions in southern Poland were described. Balance of nutrients and pollutants was calculated, forest damage using plant indicators was estimated. All data show that the forest in the Ratanica catchment is deteriorated.